Band dating-stamp



C. S. ELLIS.

BAND DATING STAMP.

APPLICATION FILED mnzo, 1919.

Patented Mar. 15, 1921.

I WITNESSES: I "Wm/ 0n (Wafi'asJZZ/z jg; A W g I ,2 4770mm PATENT,OFFICE.

CHARLES s. ELLIS, or CHICAGO, intmors.

BAND DATING-STAMP.

T all whom it may concern Be it known that I, CHARLES S. ELLIS, acitizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Band Dating- Stamps; and I do hereby declare that thefollowing is a full, clear, and exact description thereof,referencebeing had to the accompanying drawings, and to the characters ofreference marked thereon, which form apart of this specification.

This invention relates to improvements in dating stamps and like stamps;and refers in part to improvements in band wheels over which the typebands are trained and also to improvements in the type bands themselves.

The invention consists in the combination and arrangement of the partsshown in the drawings and described in the specification and is pointedout in the appended claims.

In the drawings;

Figure 1 is a side elevation of a dating stamp embodying myimprovements, with parts in section.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is an axial section of one of the band wheels.

Fig. 4 is an enlarged fragmentary section of one of the type bands innormal condition.

Fig. 5 is a similar section of the band when stretched.

The dating stamp shown is of a familiar form comprising the side members'10, the top member 11, the bridge bar 12 which connects the free endsof the members 10, the shaft 13 on which the band wheels 1% are mountedto rotate and type bands 15 which are trained about said type wheels andbridge bar.

The type wheels comprise drums 16 that are formed with axial bores 17through which the shaft 13 extends, and operating flanges 18 fitted tothe ends of the drums and having openings in alinement with the drumbores. Said flanges are peripherally roughened for engagement by thefinger and thumb to turn the band wheels. The flanges are made partsseparate from the drums, and are fixedly attached thereto by meansconstituting one phase of said invention.

Each of said drums is preferably made of wood, a relatively soft woodbeing recom- Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed January 20, 1919. 7 Serial no. 271,948,

mended, and the flange 18 may be made of any rigid, durable material,suchas indurated fiber. The flange is fixed to the drum by a metalflanged sleeve 19 of less length than said bore and of an exteriordiameter greater than the interior diameter of said bore. Said sleevethus'fits tightly within the bore of the drum, deforming or compressingthe wallof the bore so as to prevent relative rotation of the parts, andextends such distance toward the center of said bore as to furnish agood anchor for the sleeve. The outer end of the sleeve body extendsthrough the opening of the flange and is riveted or upset at 20 over theouter face of the flange. Before the flange is fitted to the drum, gluemay be applied to the end face thereof to insure, when hardened,

against turning of the flange relatively to the drum in the eventthetubular body of the sleeve should not fit sufliciently tight in thedrum and flange bores or should not be otherwise shapedto preventrelative rotation of the flange and drum. The said flangedsleevesconstitute means to fix the flanges and drums rigidly together and alsoconstitute metal bearings for the type wheels for contact with the shaft18.

As herein shown, the drums are longitudinally fluted to produce externaldepressions 21 to receive transverse convex projections 22 at the innersides of the bands, said proj ections being located severally in linewith the type blocks or projections 23, the construction being similarto that shown in my prior United States Letters Patent Number 1,069,868,dated August 12, 1913. In this form of stamp the bridge bar 12 is shapedto provide on its under side a longitudinal recess 24 to receive theprojections 22 so that thereby the bands are held at the printing linefrom shifting.

The construction described produces a very simple and eflicient typewheel which can be made at small cost, and by means which insures thatthe band bearing face thereof. will always be true to hold the type bandand its type properly alined in the assembly and thereby insure balancedtraction of the wheel drum against the type bands to thereby effectaccurate shifting of the type bands and to assist in holding the bandswith their type properly alined at the printing line.

In accordance with another phase of the invention, the inner sides ofthetyp e bands are formed by strips 25 which are applied over andvulcanized to the inner roughened faces of the rubber portions of thetype bands. The said strips 25 are in themselves inextensible and aremade slightly longer than the rubber portions of the bands at thelongitudinal axis thereof so as to lie along the inner faces of thebandsand to be ad:

posite bands, composed of the elastic body hered (as vulcanized) theretoin what may be termed a slack condition so that the comportions and theinextensible backing strips are capable of slight elongation, whichelongation is limited by the backing strips. The; purpose of so makingthe composite bands is to permit them to stretch sufliciently (as shownin Fig. 5') to allow the rounded projections at the. inner sides ofthe'bands to pass freely over the higher portions of the recessed bridgebar 12 when the bands are adjusted or shifted from one position to theother. The backing strips, however, prevent undue elongationofthe'bands. ISaid strips,

if desired, may be otherwise incorporated into the bands so as tolimited elongation. v

I claim as my invention: V

1. In a band printing stamp, a type band wheel comprising a drum ofdeformable material, having an axialbore, an operating flange having anopening alined with the drum bore,and a metal sleeverof'less length thansaid bore and fitting tightly therein to permit the desired compress ordeform the wall of thebore, said sleeve extending through said flangeand 7 into the drum and upset at one end over said flange.

2. A band dating stamp comprising a frame having a recessed typesupporting 40 member at the printing line, a plurality of "band wheelsrotatably mounted in the frame which are peripherally fluted, and typebands prising an elastic body provided with spaced, transverse tractionpro ections, and an lnex- ;tensible backing strip applied and adhered tothe back of said body with a normal slackness;

4. A type band for printing stamps composed of a rubber body havinglongitudinally spaced, transversetractionprojections, and; aninextensible backing fabric applied slackness. a: v

V In testimony whereof I claim the foregoing as my invention, Ihereuntoappend my signature at Chicago, Illinois, this 13th day of January,1919.

CHARLES S. ELLIS.

. V 3. A type band for printing stamps com- 7 "overthe back of said bodywith a normal

